Travelled from Essex to Peebles yesterday. As we crossed the border I noticed a whine coming from the engine when slowing down. Heard the same noise last time I crossed the border, turned out to be the alternator. Changed by my indie for a genuine LR one.
Probably drove another 100 miles since, whine seems louder. No problem starting or engine running, in fact she seems to be running better than ever.
IID tool shows battery voltage 12.6 at rest, 13.7 at idle and 14.5 to 14.7 at 1500rpm.
Loading the alternator with all lights heated screens etc shows no difference in readings. Full bore with AC makes no difference to the noise or readings.
Power steering all good, fluids correct.
No burning rubber smalls and from what I can see belt is fine.
I'm thinking idler pulley(s) bearing. Has anyone had a pulley fail and take the belt with it?
Will it get me back to Essex is the ultimate question?
Any ideas gratefully received.

I would say go for it you should get home one of my pulleys whined for about 2000 miles before I got round to changing it and I was in the south of France when it started

Many thanks that's very re-assuring. I'll turn the radio up.

Have you got breakdown cover? If so, I'd chance it

If not and you break down half way it could get expensive. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2007 Range Rover Supercharged in Java Black with Ivory Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior

I would go for it! These cars are awesome and robust and look after us.....

...however this is me stuck on the A31 last summer.... there are worse places to spend 5 hours.

Yep got cover. Lovely spot bet I'm not that lucky. Thanks all.

Made it home. Stripped the rad cowling etc and found a very noisy idler (the large one. Replaced - no noise. It would probably have gone quite a few more miles.

Whilst I had some of the water out of the system decided to tackle the heater control valve. Simple job but blooming awkward, lying on top of the engine. Longer arms would have helped. Needed 1/4" drive rachet on the jubilee clips even then could only turn 1/8 at a time. The valve does just pull apart after releasing the bolts but was very tight. The piston bit was tight to start with, wiggling loosened it off. Lubed with rubber grease and put back together. When replacing on the car I ensured the jubilee clips were turned and can now be reached with an extension bar.

Refilled system and bled - easy to say but what a PITA. Anyway no leaks and quiet engine.

Glad it's sorted, they usually get you home...  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Yes glad she got you home sir...